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| author | James Smart <jsmart2021@gmail.com> | 2019-05-14 23:58:02 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-06-21 11:08:37 +0200 |
| commit | 9d09dd8d7626b9124ce4bc081aabcb0590173b27 (patch) | |
| tree | 59ef879fa6298a61c586c2fc5b3b8533fe460350 /drivers/nvme/target/discovery.c | |
| parent | cgroup: export css_next_descendant_pre for bfq (diff) | |
| download | linux-9d09dd8d7626b9124ce4bc081aabcb0590173b27.tar.xz linux-9d09dd8d7626b9124ce4bc081aabcb0590173b27.zip | |
nvmet: add transport discovery change op
Some transports, such as FC-NVME, support discovery controller change
events without the use of a persistent discovery controller. FC receives
events via RSCN from the FC Fabric Controller or subsystem FC port.
This patch adds a nvmet transport op that is called whenever a
discovery change event occurs in the nvmet layer.
To facilitate the callback without adding another layer to cross into
core.c to reference the transport ops, the port structure snapshots
the transport ops when the port is enabled and clears them when disabled.
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Reviewed-by: Arun Easi <aeasi@marvell.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target/discovery.c')
| -rw-r--r-- | drivers/nvme/target/discovery.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c index 5baf269f3f8a..8efca26b4776 100644 --- a/drivers/nvme/target/discovery.c +++ b/drivers/nvme/target/discovery.c @@ -41,6 +41,10 @@ void nvmet_port_disc_changed(struct nvmet_port *port, __nvmet_disc_changed(port, ctrl); } mutex_unlock(&nvmet_disc_subsys->lock); + + /* If transport can signal change, notify transport */ + if (port->tr_ops && port->tr_ops->discovery_chg) + port->tr_ops->discovery_chg(port); } static void __nvmet_subsys_disc_changed(struct nvmet_port *port, |